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First World War (1914-1918)
The U-Boat Menace

The emergence of the submarine was a major development in naval warfare. German submarine - or U-Boat - attacks against Allied shipping in the Atlantic and in European waters posed a major threat to the Allied war effort.

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U-Boat Signalling Lamp
U-Boat Signalling Lamp

U-Boats used the blinking lights of signalling lamps to communicate in Morse Code.

The lamp had to be pointed directly at its target in order to be seen, but this narrow beam reduced the chance of being spotted by enemy ships. Radios allowed U-Boats to communicate over much larger distances, but signal lights were still vital communications equipment. Donated to the Canadian War Museum by A.R.M. Lower, a Canadian officer in the Royal Navy and later a prominent Canadian historian, the lamp is likely from U-117, which surrendered at Harwich, England on 21 November 1918, ten days after the Armistice.

Signalling Lamp, German
CWM 19740259-009





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U-Boat Deck Gun
Periscope Lens, U-117
U-Boat Signalling Lamp
Cut-Away German U-Boat Mine
German Naval Mine, U-153
SS Audax Sinking
Life Ring, SS Brussels
Life Ring, UC-77
"We risk our lives to bring you food. It's up to you not to waste it."
Porthole, RMS Lusitania
Qu'importe l'existence des Neutres! L'Allemagne est au dessus de tout! (Neutrality is irrelevant! Germany sees herself above all else!)
HMHS Llandovery Castle
Depth Charge, "Type G"
Model, U-27
First World War Atlantic Convoy
German Submarine U-118